1. Structure: there is a deposition of tungsten alloy layer on the inner and outer walls of general api standard pipes or special premium thread tubing.
2. Performance indicators
Tungsten alloy layer and backing material binding force: according to gb/t5270-2005 testing, the tungsten alloy layer does not crack or peel off.
Appearance: uniformly bright, showing silvery white
Thickness of tungsten alloy layer: 40-60£gm
Hardness of tungsten alloy layer: 560-640hv
Special premium thread tubing: hydrostatic pressure: 95mpa, load maintaining for 30 minutes, without leakage.
Gas seal: 70mpa, load maintaining for 15 minutes, without leakage.
3. Product classifications and standards
Standards of tungsten alloy anti-corrosive tubing
1. Structure: there is a deposition of tungsten alloy layer on the inner and outer walls of general api standard pipes or special premium thread tubing.
2. Performance indicators
Tungsten alloy layer and backing material binding force: according to gb/t5270-2005 testing, the tungsten alloy layer does not crack or peel off.
Appearance: uniformly bright, showing silvery white
Thickness of tungsten alloy layer: 40-60£gm
Hardness of tungsten alloy layer: 560-640hv
Special premium thread tubing: hydrostatic pressure: 95mpa, load maintaining for 30 minutes, without leakage.
Gas seal: 70mpa, load maintaining for 15 minutes, without leakage.
3. Product classifications and standards
Standards of tungsten alloy anti-corrosive tubing
Corrosion properties: resistance to corrosion of h2s and co2 with high temperature, salt water, alkali and weak acid corrosion, meeting the corrosion resistance requirements of standard nace 0177.
Wear: good wear resistance, superior or equivalent to chrome.
Coating adhesion: tested according to gb / t5270-2005, the tungsten alloy layers dont crack or peel off.
Appearance: red and black uniform tungsten alloy.
Thickness: the thickness of 0.15mm.
Performance testing
Wear and corrosion resistance test: passed a variety of the wear and corrosion resistance tests carried out by an cnpc tubular goods research institute, an maurer petroleum engineering laboratory, and quality supervision and inspection center of surface covering layer products of machinery industry.
1. Structure: there is a deposition of tungsten alloy layer on the inner and outer walls of general api standard pipes or special premium thread tubing.
2. Performance indicators
Tungsten alloy layer and backing material binding force: according to gb/t5270-2005 testing, the tungsten alloy layer does not crack or peel off.
Appearance: uniformly bright, showing silvery white
Thickness of tungsten alloy layer: 40-60£gm
Hardness of tungsten alloy layer: 560-640hv
Special premium thread tubing: hydrostatic pressure: 95mpa, load maintaining for 30 minutes, without leakage.
Gas seal: 70mpa, load maintaining for 15 minutes, without leakage.
3. Product classifications and standards
Standards of tungsten alloy anti-corrosive tubing
Standard shipping packaging as required
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1. The structure:
Api standard inner tube and the outer surface of the threaded couplings deposited tungsten alloy layer.
2. The performance indicators:
The basic properties: size, precision thread sealing meet api standards.
Threaded connection: thread has good release buckle sex.
Corrosion properties: anti h2s / co2 temperature corrosion resistance to salt water corrosion, alkali, corrosion resistance, weak acid corrosion, nace 0177 to meet the standard requirements for corrosion resistance.
Tungsten alloy layer and the substrate binding: according to gb / t5270-2005 testing, coating does not crack, not falling.
Appearance: uniformly bright, silvery white
Tungsten alloy layer thickness: <30£gm
Tungsten alloy layer surface hardness: ≥650hv
3. Performance testing
User testing feedback
Customer unit: shengli oilfield highland petroleum equipment co., ltd.
Product name: tungsten alloy tubing coupling executive standard: gb / t9253.2-1999 api spec 5b.
Test results
Thread: meet the standard requirements.
Adhesion test: under the pressure of 46mpa, the coupling is free of any leakage.
Make-up and break-out test: 13times of make-up and break-out free of any galling.
